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	<title>API: yuitest  YAHOO.util.Assert   (YUI Library)</title>

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        <h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1>
        <h3>yuitest&nbsp; <span class="subtitle">2.9.0</span></h3>
        <a href="./index.html" title="Yahoo! UI Library">Yahoo! UI Library</a> 
            &gt; <a href="./module_yuitest.html" title="yuitest">yuitest</a>
                 &gt; YAHOO.util.Assert 
                
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                    <h2>
                        

                        <code>static</code>
                        
                            Class <b property="yui:name">YAHOO.util.Assert</b>
                        <span class="extends">
                        </span>

                    </h2>
                    <!-- class tree goes here -->
                    
                
  

                    <div class="summary description" property="yui:description">
                        The Assert object provides functions to test JavaScript values against
known and expected results. Whenever a comparison (assertion) fails,
an error is thrown.
                    </div>

                    
                    <div rel="yui:properties" resource="#properties">

                    </div>

                    <div rel="yui:methods" resource="#methods">
                        <div class="section method details">
                            <h3 id="methods">Methods</h3>
                            <div class="content">
                                    <div class="protected" rel="yui:method" resource="#method__formatMessage">
                                    <h4>
                                        <a name="method__formatMessage">_formatMessage</a></h4>
                                    <div class="detail" >
                                        <code>
                                         protected 
                                         static 
                                        
                                        String
                                            <strong property="yui:name">_formatMessage</strong>
                                           (
                                                
                                                        
                                                         customMessage
                                                    
                                                
                                                        , 
                                                         defaultMessage
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Formats a message so that it can contain the original assertion message
in addition to the custom message.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">customMessage</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The message passed in by the developer.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">defaultMessage</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The message created by the error by default.</span>
                                                        </dd>
                                                </dl>

                                                <dl>
                                                    <dt>Returns:
                                                    <code property="yui:return">
                                                            String
                                                    </code></dt>
                                                    <dd property="yui:returnInfo">The final error message, containing either or both.</dd>
                                                </dl>


             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_areEqual">
                                    <h4>
                                        <a name="method_areEqual">areEqual</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">areEqual</strong>
                                           (
                                                
                                                        
                                                         expected
                                                    
                                                
                                                        , 
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is equal to another. This uses the double equals sign
so type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">expected</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The expected value.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_areNotEqual">
                                    <h4>
                                        <a name="method_areNotEqual">areNotEqual</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">areNotEqual</strong>
                                           (
                                                
                                                        
                                                         unexpected
                                                    
                                                
                                                        , 
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not equal to another. This uses the double equals sign
so type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">unexpected</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The unexpected value.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_areNotSame">
                                    <h4>
                                        <a name="method_areNotSame">areNotSame</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">areNotSame</strong>
                                           (
                                                
                                                        
                                                         unexpected
                                                    
                                                
                                                        , 
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not the same as another. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">unexpected</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The unexpected value.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_areSame">
                                    <h4>
                                        <a name="method_areSame">areSame</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">areSame</strong>
                                           (
                                                
                                                        
                                                         expected
                                                    
                                                
                                                        , 
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is the same as another. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">expected</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The expected value.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_fail">
                                    <h4>
                                        <a name="method_fail">fail</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">fail</strong>
                                           (
                                                
                                                        
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Forces an assertion error to occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display with the failure.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isArray">
                                    <h4>
                                        <a name="method_isArray">isArray</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isArray</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is an array.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isBoolean">
                                    <h4>
                                        <a name="method_isBoolean">isBoolean</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isBoolean</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is a Boolean.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isFalse">
                                    <h4>
                                        <a name="method_isFalse">isFalse</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isFalse</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is false. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isFunction">
                                    <h4>
                                        <a name="method_isFunction">isFunction</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isFunction</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is a function.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isInstanceOf">
                                    <h4>
                                        <a name="method_isInstanceOf">isInstanceOf</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isInstanceOf</strong>
                                           (
                                                
                                                        
                                                         expected
                                                    
                                                
                                                        , 
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is an instance of a particular object. This may return
incorrect results when comparing objects from one frame to constructors in
another frame. For best results, don't use in a cross-frame manner.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">expected</span>
                                                        &lt;<span property="yui:type">Function</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The function that the object should be an instance of.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The object to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNaN">
                                    <h4>
                                        <a name="method_isNaN">isNaN</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNaN</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not a number.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNotNaN">
                                    <h4>
                                        <a name="method_isNotNaN">isNotNaN</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNotNaN</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not the special NaN value.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNotNull">
                                    <h4>
                                        <a name="method_isNotNull">isNotNull</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNotNull</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not null. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNotUndefined">
                                    <h4>
                                        <a name="method_isNotUndefined">isNotUndefined</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNotUndefined</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is not undefined. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNull">
                                    <h4>
                                        <a name="method_isNull">isNull</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNull</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is null. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isNumber">
                                    <h4>
                                        <a name="method_isNumber">isNumber</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isNumber</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is a number.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isObject">
                                    <h4>
                                        <a name="method_isObject">isObject</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isObject</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is an object.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isString">
                                    <h4>
                                        <a name="method_isString">isString</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isString</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is a string.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isTrue">
                                    <h4>
                                        <a name="method_isTrue">isTrue</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isTrue</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is true. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isTypeOf">
                                    <h4>
                                        <a name="method_isTypeOf">isTypeOf</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isTypeOf</strong>
                                           (
                                                
                                                        
                                                         expectedType
                                                    
                                                
                                                        , 
                                                         actualValue
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is of a particular type.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">expectedType</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The expected type of the variable.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actualValue</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                                    <div class="" rel="yui:method" resource="#method_isUndefined">
                                    <h4>
                                        <a name="method_isUndefined">isUndefined</a></h4>
                                    <div class="detail" >
                                        <code>
                                        
                                         static 
                                        
                                        void
                                            <strong property="yui:name">isUndefined</strong>
                                           (
                                                
                                                        
                                                         actual
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        </code>
                                        
                                        <div class="description" property="yui:description">
                                            Asserts that a value is undefined. This uses the triple equals sign
so no type coercion may occur.
                                        </div>

                                        <div class="description">

                                                <dl rel="yui:parameters">
                                                    <dt>Parameters:</dt>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">actual</span>
                                                        &lt;<span property="yui:type">Object</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> The actual value to test.</span>
                                                        </dd>
                                                        <dd rel="yui:parameter">
                                                        <code><span property="yui:name">message</span>
                                                        &lt;<span property="yui:type">String</span>&gt;
                                                        </code>
                                                        <span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
                                                        </dd>
                                                </dl>



             

                                        </div>

                                    </div>
                                    <hr />
                                    </div>
                            </div>
                        </div>

                    </div>

                    <div rel="yui:events" resource="#events">


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                    <div id="methodsList" class="module">
                        <h4>Methods</h4>
                        <ul class="content">        
                                <li class="protected"><a href="#method__formatMessage" title="_formatMessage">_formatMessage</a></li>
                                <li class=""><a href="#method_areEqual" title="areEqual">areEqual</a></li>
                                <li class=""><a href="#method_areNotEqual" title="areNotEqual">areNotEqual</a></li>
                                <li class=""><a href="#method_areNotSame" title="areNotSame">areNotSame</a></li>
                                <li class=""><a href="#method_areSame" title="areSame">areSame</a></li>
                                <li class=""><a href="#method_fail" title="fail">fail</a></li>
                                <li class=""><a href="#method_isArray" title="isArray">isArray</a></li>
                                <li class=""><a href="#method_isBoolean" title="isBoolean">isBoolean</a></li>
                                <li class=""><a href="#method_isFalse" title="isFalse">isFalse</a></li>
                                <li class=""><a href="#method_isFunction" title="isFunction">isFunction</a></li>
                                <li class=""><a href="#method_isInstanceOf" title="isInstanceOf">isInstanceOf</a></li>
                                <li class=""><a href="#method_isNaN" title="isNaN">isNaN</a></li>
                                <li class=""><a href="#method_isNotNaN" title="isNotNaN">isNotNaN</a></li>
                                <li class=""><a href="#method_isNotNull" title="isNotNull">isNotNull</a></li>
                                <li class=""><a href="#method_isNotUndefined" title="isNotUndefined">isNotUndefined</a></li>
                                <li class=""><a href="#method_isNull" title="isNull">isNull</a></li>
                                <li class=""><a href="#method_isNumber" title="isNumber">isNumber</a></li>
                                <li class=""><a href="#method_isObject" title="isObject">isObject</a></li>
                                <li class=""><a href="#method_isString" title="isString">isString</a></li>
                                <li class=""><a href="#method_isTrue" title="isTrue">isTrue</a></li>
                                <li class=""><a href="#method_isTypeOf" title="isTypeOf">isTypeOf</a></li>
                                <li class=""><a href="#method_isUndefined" title="isUndefined">isUndefined</a></li>
                        </ul>
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